Process for producing high quality bio-oil in high yield

C - Chemistry – Metallurgy – 10 – G

Patent

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C10G 11/05 (2006.01)

Patent

CA 2754165

A process is disclosed for converting a particulate solid biomass material to a high quality bio-oil in high yield. The process comprises a pre-treatment step and a pyrolysis step. The pretreatment comprises a step of at least partially demineralizmg the solid biomass, and improving the accessibility of the solid biomass by opening the texture of the particles of the solid biomass. In a preferred embodiment the liquid pyrolysis product, is separated, into the bio-oil and an aqueous phase, and the aqueous phase is used, as a solvent in the demineralizatioii step and/or in the step of improving the accessibility of the solid biomass by opening the texture of the particles of the solid biomass.

L'invention porte sur un procédé de conversion d'un matériau de biomasse solide particulaire en une bio-huile de qualité élevée avec un rendement élevé. Le procédé comprend une étape de prétraitement et une étape de pyrolyse. Le prétraitement comprend une étape de déminéralisation au moins partielle de la biomasse solide, et une étape d'amélioration de l'accessibilité de la biomasse solide par ouverture de la texture des particules de la biomasse solide. Dans un mode de réalisation préféré, le produit de pyrolyse liquide est séparé en bio-huile et une phase aqueuse, et la phase aqueuse est utilisée, en tant que solvant dans l'étape de déminéralisation et/ou dans l'étape d'amélioration de l'accessibilité de la biomasse solide par ouverture de la texture des particules de la biomasse solide.

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